could you please publish the PayloadFormat-DECODER you're using for all ports?
thanks!
with the new version (original GPS positioned at the window) I get
17:40:21 5 4 dev id:rak811_tracker_01 payload:0371000000000000
17:39:58 4 3 dev id:rak811_tracker_01 payload:026701220403019A
17:37:50 3 2 dev id:rak811_tracker_01 payload:0188073CB5014DA200C990